.app {
  padding: 20px;
}

.app h1 {
  color: cadetblue;
  border-bottom: 4px solid cadetblue;
}

.app .input {
  margin-top: 20px;
  display: flex;
  height: 50px;
}

.app .input input {
  flex: 1;
  border-color: cadetblue;
  padding: 0 10px;
  font-size: 20px;
}

.app .input a {
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  font-size: 20px;
  background-color: cadetblue;
  color: #fff;
}

.app .item {
  padding: 10px;
  font-size: 22px;
  font-weight: bold;
  border: 1px solid cadetblue;
  margin: 10px 0;
}

.app .empty {
  padding: 100px 0;
  text-align: center;
  color: #aaa;
}
